mac80211: add fixed_rate management to minstrel rc

Add the capability to use a fixed modulation rate to minstrel rate controller

Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
Acked-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/mac80211/rc80211_minstrel.c b/net/mac80211/rc80211_minstrel.c
index 8b5f7ef7c0c9f14db5dba3baf8ab82247500c1c3..7fa1b36e620247ed5c14e97d54b2d72d7a0b43cb 100644 (file)
--- a/net/mac80211/rc80211_minstrel.c
+++ b/net/mac80211/rc80211_minstrel.c
@@ -203,6 +203,15 @@ minstrel_update_stats(struct minstrel_priv *mp, struct minstrel_sta_info *mi)
        memcpy(mi->max_tp_rate, tmp_tp_rate, sizeof(mi->max_tp_rate));
        mi->max_prob_rate = tmp_prob_rate;
 
+#ifdef CONFIG_MAC80211_DEBUGFS
+       /* use fixed index if set */
+       if (mp->fixed_rate_idx != -1) {
+               mi->max_tp_rate[0] = mp->fixed_rate_idx;
+               mi->max_tp_rate[1] = mp->fixed_rate_idx;
+               mi->max_prob_rate = mp->fixed_rate_idx;
+       }
+#endif
+
        /* Reset update timer */
        mi->stats_update = jiffies;
 
@@ -310,6 +319,11 @@ minstrel_get_rate(void *priv, struct ieee80211_sta *sta,
        /* increase sum packet counter */
        mi->packet_count++;
 
+#ifdef CONFIG_MAC80211_DEBUGFS
+       if (mp->fixed_rate_idx != -1)
+               return;
+#endif
+
        delta = (mi->packet_count * sampling_ratio / 100) -
                        (mi->sample_count + mi->sample_deferred / 2);